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Forum Discussion
WD Red 3TB high RawReadErrorRate
Good day,
Using a ReadyNAS Duo v2 I have almost reached my 3TB capacity in X-RAID2 mode. I was looking to expand, and upon checking the SMART status of the two discs, I have found, what I believe to be problems with the DISC2.
For my peace of mind, i have just started a full backup of the NAS.
I am then relying on people here to advise me what to do next. I need more capacity, and was planning to convert the RAID to give me 6TB capacity. However, to do that, I will maybe need to buy a new WD 3TB RED.
What are peoples thoughts here?
I also notice that when playing GoPro3HD footage from the NAS to my iMac, I experience a lot of jitter. I think it is my mac that causes that.
Thank you
Using a ReadyNAS Duo v2 I have almost reached my 3TB capacity in X-RAID2 mode. I was looking to expand, and upon checking the SMART status of the two discs, I have found, what I believe to be problems with the DISC2.
SMART Information for Disk 1
Model: WDC WD30EFRX-68AX9N0 2794 GB
Serial Number: WD-WMC1T0570XXX
Firmware Version: 80.00A80
SMART Attribute
Raw Read Error Rate: 0
Spin Up Time: 6050
Start Stop Count: 3661
Reallocated Sector Count: 0
Seek Error Rate: 0
Power On Hours: 8504
Spin Retry Count: 0
Calibration Retry Count: 0
Power Cycle Count: 30
Power-Off Retract Count: 25
Load Cycle Count: 3635
Temperature Celsius: 33
Reallocated Event Count: 0
Current Pending Sector: 0
Offline Uncorrectable: 0
UDMA CRC Error Count: 0
Multi Zone Error Rate: 0
ATA Error Count: 0
SMART Information for Disk 2
Model: WDC WD30EFRX-68AX9N0 2794 GB
Serial Number: WD-WMC1T0573XXX
Firmware Version: 80.00A80
SMART Attribute
Raw Read Error Rate: 102
Spin Up Time: 6508
Start Stop Count: 3645
Reallocated Sector Count: 0
Seek Error Rate: 0
Power On Hours: 8505
Spin Retry Count: 0
Calibration Retry Count: 0
Power Cycle Count: 29
Power-Off Retract Count: 24
Load Cycle Count: 3620
Temperature Celsius: 34
Reallocated Event Count: 0
Current Pending Sector: 3
Offline Uncorrectable: 0
UDMA CRC Error Count: 0
Multi Zone Error Rate: 0
ATA Error Count: 0
For my peace of mind, i have just started a full backup of the NAS.
I am then relying on people here to advise me what to do next. I need more capacity, and was planning to convert the RAID to give me 6TB capacity. However, to do that, I will maybe need to buy a new WD 3TB RED.
What are peoples thoughts here?
I also notice that when playing GoPro3HD footage from the NAS to my iMac, I experience a lot of jitter. I think it is my mac that causes that.
Thank you
24 Replies
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- The raw read error rate "stores data related to the rate of hardware read errors that occurred when reading data from a disk surface. The raw value has different structure for different vendors and is often not meaningful as a decimal number" http://en.wikipedia.org/wiki/S.M.A.R.T. ... attributes
So its not clear how high the number is. All but one of my red drives has 0 though - the exception has a 2. - I investigated on the meaning of that value some time ago. Seagate drives have very high number and it's perfectly normal. Someone involved in a business where a high number of drives were being used told me it was a nightmare to have information from the manufacturers, even though it was their interest to provide some details!
Both my REDs have 0. Not sure how/if you can find out if 102 is a reason for concern or not though. - I suppose you could run lifeguard on the drive (in a PC) and see if it failed.
- I started a backup of the c: of the nas via dashboard 19 hours ago and it had only copied 600gb of the 2.7tb so far.
I am using a usb3 drive, so I would have expected it to have finished by now, but it hasn't.
Does this confirm a dying disc?
Can someone point me to a speed table that shows what speeds I should expect from the nas in different uses? - The Duo v2 is a low power system, it will never get near maxing out USB3. What filesystem is on the USB HDD? NTFS will be the slowest performer.
chirpa wrote: The Duo v2 is a low power system, it will never get near maxing out USB3. What filesystem is on the USB HDD? NTFS will be the slowest performer.
Yep, its in NTFS mode as the NAS has all sorts of files on there ranging for word documents, mp3 to huge 30GB video files.
Really disappointed with the NAS. I dont think its working right. This is my 2nd NAS.
I originally had the ReadyNAS Duo which got REALLY slow, so i bought the NASv2 and now i am having these issues. Hurts a lot as i never seem to have benefited from a NAS over a USB attached HDD.
Is there ''optimal'' settings posted somewhere....perhaps im not configured correctly.- If you format the USB disk to use e.g. EXT3 then performance should be considerably quicker.
Both NAS units you've got are entry level. If you replace an entry-level system with a newer entry-level system you could expect perhaps to get a little better performance than before but still entry-level performance.
If you want fast USB performance getting a NAS with a fast Intel CPU is the way to go. - Also, the fastest way to back up the NAS is over a wired gigabit network (connecting the USB drive to a PC and copying from the PC).
- seems you need more than ''entry-level'' knowledge to know how to get the most out of the readynas!
True with most gadgets I think. But perhaps more true with NAS (no matter what vendor you use). Some knowledge of RAID, Linux, and protocols helps.jhbingham wrote: seems you need more than ''entry-level'' knowledge to know how to get the most out of the readynas!
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